greater amberjack grow out husbandry

The objectives of the WP are (1) development of appropriate rearing methods for cages including rearing volume and type of cage and (2) development of feeding methods for fry and juveniles by identifying daily rhythms and feeding frequency.

Participant organizations (WP leader in bold): P1. HCMR, P2. FCPCT, P8. IEO, P15. ULL, P27. FORKYS and P28. CANEXMAR In this WP rearing methodologies for the cage rearing of the greater amberjack will be developed with emphasis on (a) the cage technology, (b) the feeding method and (c) the husbandry practice.Task 21.1 Development of rearing method in cages

Subtask 21.1.1 Effect of rearing volume on performance. Trials will be performed in commercial cages. Growth performance will be estimated together with other controls (muscle quality, haematological, immunological and hormonal evaluation).

Subtask 21.1.2 Effect of cage type on performance. A comparison of surface and submerged cages will be performed in trials with commercial cages.

Task 21.2 Development of feeding methods. Test of different feeding methods including estimation of daily rhythm and frequency be tested with individuals at different developmental stages of juveniles (5 g and 200 g individuals).

Subtask 21.3.1 Determination of minimum-maximum temperature ranges. The trial will be performed with different size individuals. Monitoring will include growth performance, feeding activity, gut transit time, digesta sample analysis and enzyme activity.